$ git clone -n https://src.fedoraproject.org/rpms/mdds.git /var/lib/mock/f45-build-18184-510/root/chroot_tmpdir/scmroot/mdds
Cloning into '/var/lib/mock/f45-build-18184-510/root/chroot_tmpdir/scmroot/mdds'...
$ git fetch origin b53f03ee0243ea4cdce253c9441ddcf48e705f61:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mdds
 * [new ref]         b53f03ee0243ea4cdce253c9441ddcf48e705f61 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b53f03e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild